A woman trapped in rubble after the earthquake in Christchurch yesterday left a harrowing message for her son, in which she said she didn't think she would survive.

The family of Australian-born Anne Vos has not known whether she was alive or dead, but TV3 has just reported that she has been rescued and is injured but alive.

There were earlier reports that Ms Vos had been rescued and was on her way to hospital, but it is understood media may have confused her with Ann Bodkin who was rescued from the ruins of the PGG building from where Ms Vos called her son, Robert.